My mbx-5 is running a 1512 1.5YF 1900kv...if memories serves on 5s and it flies..I agree...The 1512 3D/F 1700kv would be a good choice
Also, WELCOME to RCM
1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S